linbox
examples/valence.C
/*
* examples/valence.C
*
* Copyright (C) 2005, 2010 J-G Dumas
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#include <iostream>
#include <linbox/blackbox/transpose.h>
#include <linbox/blackbox/compose.h>
#include <linbox/solutions/valence.h>
#include <linbox/util/matrix-stream.h>
using namespace LinBox;
int main (int argc, char **argv)
{
commentator().setMaxDetailLevel (-1);
commentator().setMaxDepth (-1);
commentator().setReportStream (std::cerr);
if (argc < 2 || argc > 3) {
std::cerr << "Usage: valence <matrix-file-in-supported-format> [-ata|-aat]" << std::endl;
return -1;
}
std::ifstream input (argv[1]);
if (!input) { std::cerr << "Error opening matrix file " << argv[1] << std::endl; return -1; }
Givaro::ZRing<Integer> ZZ;
typedef SparseMatrix<Givaro::ZRing<Integer> > Blackbox;
Blackbox A (ms);
std::cout << "A is " << A.rowdim() << " by " << A.coldim() << std::endl;
Givaro::ZRing<Integer>::Element val_A;
if (argc == 3) {
if (strcmp(argv[2],"-aat")) {
Compose< Transpose<Blackbox>, Blackbox > C (&T, &A);
std::cout << "A^T A is " << C.rowdim() << " by " << C.coldim() << std::endl;
valence(val_A, C);
}
else {
std::cout << "A A^T is " << C.rowdim() << " by " << C.coldim() << std::endl;
valence(val_A, C);
}
}
else {
if (A.rowdim() != A.coldim()) {
std::cerr << "Valence works only on square matrices, try either to change the dimension in the matrix file, or to compute the valence of A A^T or A^T A, via the -aat or -ata options." << std::endl;
exit(0);
}
else
valence (val_A, A);
}
std::cout << "Valence is " << val_A << std::endl;
return 0;
}
// Local Variables:
// mode: C++
// tab-width: 8
// indent-tabs-mode: nil
// c-basic-offset: 8
// End:
// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s